JPH0411477U - - Google Patents
Info
- Publication number
- JPH0411477U JPH0411477U JP5291590U JP5291590U JPH0411477U JP H0411477 U JPH0411477 U JP H0411477U JP 5291590 U JP5291590 U JP 5291590U JP 5291590 U JP5291590 U JP 5291590U JP H0411477 U JPH0411477 U JP H0411477U
- Authority
- JP
- Japan
- Prior art keywords
- phase
- open
- detection circuit
- photocoupler
- alternating current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001514 detection method Methods 0.000 claims description 5
- 238000012544 monitoring process Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
Landscapes
- Emergency Protection Circuit Devices (AREA)
- Measurement Of Current Or Voltage (AREA)
Description
第１図は本考案に係る欠相検出回路の電気回路
図、第２図は同じく更に具体的な電気回路図であ
る。
２……欠相検出回路、３……欠相監視回路、２
１，２２……フオトカプラ、２３〜２５……ダイ
オード、２６，２７……抵抗、３１……欠相表示
用の発光素子、３２……３端子スイツチ素子、３
３〜３５……抵抗、３６，３７……ツエナーダイ
オード、３８，３９……コンデンサ。
FIG. 1 is an electric circuit diagram of an open phase detection circuit according to the present invention, and FIG. 2 is a more specific electric circuit diagram. 2...Open phase detection circuit, 3...Open phase monitoring circuit, 2
1, 22...Photo coupler, 23-25...Diode, 26, 27...Resistor, 31...Light emitting element for open phase display, 32...3 terminal switch element, 3
3 to 35... Resistor, 36, 37... Zener diode, 38, 39... Capacitor.
Claims (1)
つて、 前記多相交流の相間に欠相検出用のフオトカプ
ラを接続したこと を特徴とする欠相検出回路。 (2) 前記フオトカプラの出力を監視する欠相監
視回路を有することを特徴とする請求項１に記載
の欠相検出回路。[Claims for Utility Model Registration] (1) An open-phase detection circuit for detecting open-phase in multi-phase alternating current, characterized in that a photocoupler for detecting open-phase is connected between the phases of the multi-phase alternating current. Phase detection circuit. (2) The open phase detection circuit according to claim 1, further comprising an open phase monitoring circuit that monitors the output of the photocoupler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5291590U JPH0411477U (en) | 1990-05-21 | 1990-05-21 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5291590U JPH0411477U (en) | 1990-05-21 | 1990-05-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0411477U true JPH0411477U (en) | 1992-01-30 |
Family
ID=31573635
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5291590U Pending JPH0411477U (en) | 1990-05-21 | 1990-05-21 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0411477U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001235504A (en) * | 2000-02-23 | 2001-08-31 | Kawamura Electric Inc | Leak and phase interruption discriminating measuring instrument |
| JP2011135752A (en) * | 2009-12-25 | 2011-07-07 | Japan Aviation Electronics Industry Ltd | Open-phase detection circuit and method of detecting open phase |
-
1990
- 1990-05-21 JP JP5291590U patent/JPH0411477U/ja active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001235504A (en) * | 2000-02-23 | 2001-08-31 | Kawamura Electric Inc | Leak and phase interruption discriminating measuring instrument |
| JP4548753B2 (en) * | 2000-02-23 | 2010-09-22 | 河村電器産業株式会社 | Electric leakage / phase loss discriminator |
| JP2011135752A (en) * | 2009-12-25 | 2011-07-07 | Japan Aviation Electronics Industry Ltd | Open-phase detection circuit and method of detecting open phase |
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